Checking if an unknown class given by getClass() is a certain class

Question

I have a type of Object variable called obj (Object obj). I'm using obj.getClass() and I want to check if the returned class is actually a certain class, in my case a class named Student. How do I do that?

I tried obj.getClass().isInstance(Student) but it tells me that Student cannot be resolved to a variable. Also yes I've done my research and have found similar questions on SO but for some reason nothing I've done works.

@Marv I'm using instanceof and it says Incompatible conditional operand types Class and Student — JohnEm, May 14 '20 at 22:59
@Marv oh my god it worked. i spent two hours trying to solve this out and you did it in 2 minutes lol. thank you — JohnEm, May 14 '20 at 23:02
You're welcome. Feel free to delete the question, as it's a duplicate and would probably be closed anyways. — Marv, May 14 '20 at 23:10

score 1 · Answer 1 · answered May 14 '20 at 23:34

1

You can use ‘Student.class.isAssignableFrom(obj.getClass())‘ or if you have the instance of the object just ‘obj instanceof Student‘.

answered May 14 '20 at 23:34

Nightloewe

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Checking if an unknown class given by getClass() is a certain class

1 Answers1